Adjustable linear-dimension gauge



July 13, 1965 c. E. JOUANNY 3,193,935

ADJUSTABLE LINEAR-DIMENSION GAUGE Filed 00t- 29, 1962 United States Patent 3,193,935 f ABXUSTABLE LlNEAR-DIMENSEOII GAUGE Clement Eugene ionanny, 33 rue Robert Lindet, Paris, France Fitted (Bet. 29, 1962, Ser. No. 233,631

Ciaims priority, application France, Mar. 12, 1962,

890,710, Patent 1,324,965

4 Ciaiins. (Cl. 'S3-143) The present invention relates in general fashion to measuring apparatuses such as adjustable linear-dimension gauges.

It is already known to constitute gauges by means of two or more jaws which are movable in relation to one another and are guided in rectilinear relative paths which are precisely defined by means of appropriate notchings or groovings. For the measurement, a relative displacement of the jaws is effected in order to bring the measuring parts provided thereon to the desired spacing, which is determined by means of graduations provided on matching elements of the gauge.

One of the purposes of lthe invention is to provide improvements in the measuring apparatuses or gauges of this type in order that a play-free control may be obtained of the mutually movable jaws, while permitting their easy displacement.

The invention is carried out in a measuring apparatus such as an adjustable linear dimension gauge comprising at least two jaws movable in relation to one another which are guided one'upon the other by a preferably triangular notching, the two jaws being retained in the assembled position by a spindle passing through aligned orifices of the said jaws, this spindle being locked in translation in the fixed jaw and carrying control elements cooperating with matching control elements provided on the movable jaw, one threaded end of this spindle receiving a nut; which is separated from the adjacent jaw by a bearing washer associated with an elastic element, while its other end carries an abutment element or plate which bears directly or indirectly upon the adjacent jaw.

The use of a bearing washer associated with an elastic element, between the nut provided at one end of the spindle and the adjacent jaw, permits of obtaining a play-free assembly of the two jaws which is capable of supplying the requisite precision, while retaining a sufficiently smooth control. The compression of the elastic element permits of making the control firmer or of effecting the locking of the gauge, while the bearing washer which is engaged on a non-circular part of the spindle by means of an orifice of corresponding shape bears upon the associated jaw and permits a uniform rotation without jamming or gripping, especially by reason of the large area of contact then obtained.

The other end of the spindle can carry a cone or a shouldered cylindrical part receiving the abutting plate, which can be locked for example by means of a screw.

The spindle is preferably journalled in the fixed jaw by means of a bearing bush which according to need can be eccentric in order to permit perfect adjustment, this bush being advantageously of anti-friction metal and preferably possessing a flange directed towards the aforementioned nut, this :flange facilitating its securing upon the fixed jaw and co-operating with the bearing washer.

According to one possible form of embodiment, the spindle carries in alignment with the movable jaw and outside of the bearing bush a cam or an eccentric which can be provided with one or more lobes and can move in an appropriate recess of the movable jaw.

According to another form of embodiment, the abutting plate carries on its face directed towards the movable jaw a spiral threading, and this jaw possesses a threaded table with which the aforementioned threading coopice erates to cause a longitudinal relative displacement on angular movement of the spindle. In this case an element for the protection of the spiral threading, such as a small plate of fibre, is preferably provided opposite to the threaded table, in relation to the spindle.

According to yet a further form of embodiment there are provided two movable jaws guided in the above-indicated manner, carrying threaded tables co-operating with the spiral threading of the abutting plate. In this case the displacement obtained is twice that of the previous form of embodiment.

The abutting plate advantageously possesses a peripheral chamfer. Each movable jaw is further graduated so as to permit the reading of the measurement against an associated reference mark carried by the fixed jaw, or vice versa. This plate can be disengaged from the cone or cylindrical part, adjusted angularly to the desired position, then relocked as desir-ed.

The dimensions of the apparatuses or gauges according to the invention are those necessary for the operation intended upon the workpieces to be produced or manufactured and the measuring parts which are externaland/ or internal can be provided with Contact surfaces of hard material, for example of tungsten carbide.

The invention will be better understood by reference to the following description relating to the accompanying drawing, which is given by way of non-limitative example, and wherein:

FIGURE 1 represents a measuring apparatus such as an adjustable linear dimension gauge, in accordance with the invention, showing one embodiment of this apparatus;

FIGURE 2 is a View in section along the line II-II in FIGURE 1;

FIGURE 3 is a view similar to FIGURE 1, showing a second embodiment; j

FIGURE 4 is a view in section valong the line IV-IV in FIGURE 3;

FIGURE 5 is a view similar to FIGURE 1 but showing a third embodiment; and

FIGURE 6 is a view in section along the line VI-VI in FIGURE 5.

The measuring apparatus as represented in FIGURE 1 comprises, in its first embodiment, a fixed jaw 1 and a movable jaw 2 which are guided one upon the other by a triangular notching 3, the two jaws 1 and 2 being retained in the assembled position by a spindle 4 passing through aligned orifices of the said jaws and journalled in the fixed jaw 1 by means of a bearing bush 5, advantageously of anti-friction metal, possessing a ange 6 permitting the securing of the bearing bush 5 by means or" screws 7 upon the fixed jaw 1.

The spindle 4 comprises a threaded part 4a intended to receive a locking nut 8 which is separated from the fixed jaw 1 by a bearing washer 9 which is engaged on a non-circular part of the spindle 4 by means of an orifice of corresponding shape, and is associated with an elastic washer 10.

The other end of the spindle 4 carries a cone 11 on which there is engaged an abutting plate 12 which can be locked on this cone by means of a screw or collar 13. According to the form of embodiment as represented in FIGURES 1 and 2, the spindle 4 carries, in alignment with the movable jaw 2 and outside of the bearing bush 5, a cam or eccentric 14 which can move in an appropriate recess 15 of this movable jaw 2. On a movement of the spindle d the eccentric 14 causes the longitudinal displacement of the movable jaw 2 in the direction of the arrow f (FIGURE l).

The abutting plate 12 possesses a peripheral chamfer 16. A graduation 17 is provided on the movable jaw 2 in order to permit the reading of the measurement opposite a reference mark 18 carried on the fixed jaw 1.

These graduations can be of any desired type and ycan form a Vernierl scale.

In the second'form of embodiment as represented in f i ing Vsaid jaws for movement relative to each other, said FIGURE 3 and as shown in section in FIGURE 4, there maybe seen the same elements as in therst form of embodiment butin this example the spindle 4 isassociated with an abutting plate 19 which carries, on its Vface di? rected towards the movable jaw 2,*.a spiral threading 2t? :zo-operating 'with' a Vthreaded table 21 carried-by the mov,-

` Vable jaw 2, in order-to cause a relative longitudinal'displacement of the' movable jaw Z in the directionof the i arrow f1 (FIGURE 3),on Vangular movement of thev spinstationary'jaw having a bore therein, a spindle rotatably monntedrwith'in said bore, said movable jaw having an oriiioe therein, said oriiice being ot a size greater than said spindle to'allowV for the movement of the movable jaw relative to; said spindle, the ends of said spindle projecting .trom the jaws, a plate rigidly mounted upon one end'of :said spindle,1alcam rigid with said spindle, said movable Ydle 4. An element for the protection ofthe spiral'thre'ading 20, constituted by a' bre plate 22, is xed on the movable jaw'Z opposite, the threaded table 2l in rela,-V

tionto'the spindle 4.

In the third form of embodimentA as represented in *FIG-v URE 5 and as seen in section in FIGURE 6, two movable jawsZa and Zbare provided, each carrying a threaded table 21a and 2lb co-operating withV the spiral threading 20 of the abutting plate' i9.Y In this example the/two movable-jaws 2a and Zbrmove simultaneously in the direction of the arrows f2 (FIGURE 57)'fon angular move-Vy ment of the spindle 4. VIn this case the displacement ob#Y Y tained is twice that of the previous example. The movable jaws'cornprise a graduation I8' each for'the purposeof permitting reading against the graduation 17 provided on the plate 19.1 Y

. The abutting plates 12 and 19 can'b'eY disengaged from fy the cone'll, adjusted angularly to the desiredY position,

then relocked as desired withV the aidA of ,screws or bolts 13a.Y l f v The locking nuts y8' and the Vabutting'plates l2 and ,19

comprise blind holes 23 permitting, `with'the aid of an appropriate key, 0f effecting theV slackening andthe locking of the nuts4 8 and of causing the angular movementy of the spindle 4. The use of thel bearing washer 9 assof j ciatedwith the elastic Vwasher 10 between the nut 8 and the iixed jaw 1 permits of obtaining a' play-free assemblyof the two jaws 1 andY 2, capable of furnishing the jaw having a recess vthereirnsaid'recess cooperating with said camrfor the control ofs'aid movable jaw, an adjustable nut provided on the other end of said spindle, a bearing washer-locateid-on said spindle Ybetween'said nut and said stationary jaw, a spring washer clamped betweenfsaid 'nut and said bearing fwasher, and a bearing bush made j of anti-frictionfmetal surrounding said spindle, said bush being provided with an exposed liange, said bearing washer being'rotatable with said spindle and being pressed `against said liange Yby said spring washer.

' 3. An adjustable linear-dimension gauge comprising a stationary jaw, twomovable jaws, means for guiding said jaws for movement relative to Veach other, said stationary jaw having two bores therein, aV spindle rotatably mounted within each bore, each movableV jaw'having an orice therein, said ,orifice being of al size greater than said spindie to allow'for the movementof said movable jaw relative to the corresponding spindle, the ends of said spindles Vprojecting from the jaws, a'plate'rigidly connected to one rend ot each spindle, a spiralthreading provided on said plate towards said Vmovable jaw, a threaded tablev provided on each movable vjaw for cooperation with said spiral threading of each plate for moving said movable jaws relative to 'said stationary jaw', an adjustable nut provided on the.V other end of veach spindle, a Vbearing washer 1ocated on each spindle between said nut and said stationaryjaw, aV spring washer clamped between said nut and said bearing washer, andy a bearingV bush made of antifriction'me'tal surrounding each spindle, said bush being providedrwith van exposed yflange, Vsaid bearing washer beingrotatable-with said spindle and Ybeing pressedagainst required'precision while'retainingV a sufciently smooth control. .Y ,7, Y

. The measuring parts 24 can be provided, on their ini Y Y ternal facesV 24a or external faces 24b,"with contact Vsurstationary jaw, at least one movable jaw, means forfguid-Y ing said jaws for movement relative to eachother, said said llange by said spring washer. c. A,

4. An adjustable,linear-dimension gauge comprising a stationary'jaw, two, movable jaws,"means for guiding said jaws for `movement relativeto each other`said stationary Yjaw-having a bore therein, aspindle rotatably mounted withinY said bore, said movable .jaws Vbeing located on veither'side of said spindle, the endsof said spindle projecting frornfthe jaws,.aV plate'r'rigidly connected to vone end 4of said spindle, spiralthreadings provided Von said l plate towards'said movable jaws, a threaded ltable pro# vided on each movable jaw forjcoo'peration with said spiralthreadings ofthe plate for moving said movable jaws j `relativ-e Vto said stationary jaw, anadjustable nut provided on the other end of saidspindle, a bearing washer located stationary'jaw having a boreV therein, a spindle'rotat-V l ably mounted within said bore', said movable jaw having an orifice therein, said or'ice being of Vajsirze'greate'rthan said spindle to allow forr the movement of the movable Vjaw relative toV said spindle, the ends of said spindle projecting from the jawsfa plate`rigidly mounted upon vone end of said spindle, means rotatable with said plateand spindle'and cooperating with said movable jaw for moving the same relative to said stationary jaw, an adjustable nut provided on theother end of said spindle, Va Ybearing washer located on said spindle between saidV nut Yand said f stationary jaw, a spring washer clamped between Vsaid nut and said bearing washer, and; a bearingbush'made'ot l Y anti-friction metal surroundingY said spindle, Vsaid .bushV being provided with an exposed flange, said bearing washerV being rotatable with' said spindle and being against said flange by said Spring washer.

2. An adjustable linear-dimension gauge comprising a Y vstationary* jaw,fat least one movable jaw, means tor guid- PWSSs-d Y Y.

VISAAC LrsANN, Primary Examinar.V Y

on said spindle between said nut and said stationary jaw, a

lspring washerrclamped between said nut and said' bearing washer, and a bearing bush made of Vanti-friction metal surrounding said` spindle, `said bush being 'provided with tan exposed'iiange, said bearing washer beingrotatable Ywith said spindle and being pressedagainstfsaid ilange by said spring washer. Y l Y References Cited byftlseExarninex" ,c Y y UNtTnD STATES VPATENTS 10/21 Gonzalez 33-'161 X .2,019,359 10/.35 oswin 33 168 2,402,778 v6/16 Y Rotnep e e r 33 164 Y Y Y YYFOREIGN PATENTS 973,778 9/750 France* Y Y 

1. AN ADJUSTABLE LINEAR-DIMENSION GAUGE COMPRISING A STATIONARY JAW, AT LEAST ONE MOVABLE JAW, MEANS FOR GUIDING SAID JAWS FOR MOVEMENT RELATIVE TO EACH OTHER, SAID STATIONARY JAW HAVING A BORE THEREIN, A SPINDLE ROTATABLY MOUNTED WITHIN SAID BORE, SAID MOVABLE JAW HAVING AN ORIFICE THEREIN, SAID ORIFICE BEING OF A SIZE GREATER THAN SAID SPINDLE TO ALLOW FOR THE MOVEMENT OF THE MOVABLE JAW RELATIVE TO SAID SPINDLE, THE ENDS OF SAID SPINDLE PROJECTING FROM THE JAWS, A PLATE RIGIDLY MOUNTED UPON ONE END OF SAID SPINDLE, MEANS ROTATABLE WITH SAID PLATE AND SPINDLE AND COOPERATING WITH SAID MOVABLE JAW FOR MOVING THE SAME RELATIVE TO SAID STATIONARY JAW, AN ADJUSTABLE NUT PROVIDED ON THE OTHER END OF SAID SPINDLE, A BEARING WASHER LOCATED ON SAID SPINDLE BETWEEN SAID NUT AND SAID STATIONARY JAW, A SPRING WASHER CLAMPED BETWEEN SAID NUT AND SAID BEARING WASHER, AND A BEARING BUSH MADE OF ANTI-FRICTION METAL SURROUNDING SAID SPINDLE, SAID BUSH BEING PROVIDED WITH AN EXPOSED FLANGE, SAID BEARING WASHER BEING ROTATABLE WITH SAID SPINDLE AND BEING PRESSED AGAINST SAID FLANGE BY SAID SPRING WASHER. 